Improvement in grate-bass



y Hitch tetra @anni @fitta l ANDREW HARTUPEE, 0F Hersenen. PENNSYLVANIA.

Leserspaantlva 17,oe8,saaa.4prn21,18es.

mrs. vsMrNr IN cams-sass.

dlgs .Sitchin nfemt tn-in ttm strs 331mm mit matting tart si tte time TO ALL WIIOM IT MAY CONCERN:

Be it known that I, ANDREW HAarUPns, of the city of Pittsburg, in the county of'Allegheny, .and State of Pennsylvania, have invented a new and'useful Improvement in Grate and Bearing-Bars for Furnaces.; andl I do hereby declarethe following to he a full, clear, and exact description thereof, reference being. had to the accompanying drawing making a part oi'- this specification, inwhich- Figure 1 is a froht elevation of a furnace fitted with my improved grate and bearing-bars.

Figure 2 shows the grate-bar in side view, and the bearing-bars in cross-section, and

Figure 3 is a top view of my improved gratefber, which shows lthe apertures through which air is admitted to the re of the furnace.

Like letters indicate like parts in each.

My improvement is particularlyfdesigned for use in' paddling, iron, or rolling-millffurnaces, though it lis advantageously applicable to other furnaces in which a considerable amount of fuel is employed, anda. high degree of heat required; and the nature o f i t consists, first, in makingan improved grate-bar of T-shaped iron,

l either rolled or cast, with or without the,A usual apertures in its upper or broad face for the admission of air;

sccpnd, in an arranfgmmentof circularapertures 'through the grate-har near toeach edge; third,`in an arrangement of cross-bearing hars, so notched as to receive the lower or anged part of the T-iron barffo'r thev pur pose of holding it lsteadily in place, and enabling itmore easily tobe removed and replaced' in cleaning the 1 furnace. To enable others skilled in the art to make and use my invention, I will. proceed to describe itssaa'n'atrnh tion and manner of'nse.v

a a represent the side walls of a heating-furnace, into which are built the cross-hearing bars b. These are properly notched at suitable distances, as at c, so as tov receive the lower or flanged parts d of -the T-shaped bars.. The distances between the notches c shouldbe such that the proper apertures e will be left'be'tween the' bars. These bars -I make of either rolledI or cast T-iron, the upper or b'road part forming the upper part', of the bar, and the lower or anged part d', forming a brace or rib to support and addstx'engthl to the har, astweil as acting as a guide in thenotchcs c to keep it in place.

In either side of' the rib di, atits junction with the broad face cl ofthe bar, I make a series of similar apere tures, fi', as shown in iig. 4, nearto the outer edges of the upper face of the bar. lSuch apertures I make of any size that maybe desired, butwith particular reference to securing the required amount of air without unnecessary 'loss of fuel in consequence of its falling through.

I I'n puddling and iron-milffurnaces, vthe grate-bars u sually employed consist of bar-iron, cut tothe desired length, ywhich are laid bn dat cressbearei\s. As such bars have nothing to hold them at the required ,distances from each other, they are liable to become displaced, so as' to leave large apertures, through whichfnel fallsand is lo'st; hiid, as they`are about three inches in width, they interfere seriously with afreesupply of freshv air to theiire.

These ditlicultiesI wholly avoid by the use of a T-iron grate-bar, with apertures as described,`^a'ud set in notches c, which-are cut in the cross-bearers b. I also secure a for stronger andmore durable bar by means of the rib cZQwith but` slight increase of cost. They canbe kept free of cinder, clinker, and ashes as easily as the ordinary gratelbar, through the apertures e, or, when required, can be drawn'fr'om the Yfurnace by the handles` f, andreplaccd or renew-ed.

What I claimne my invention, and desire to* secure by Letters Patent, is-

1. The. notched cross-bearers oi` a furnace, in combination with the rib d' of va T-shaped grate-bar, of either cast or wrought-iron, constructed and used substantiallyias and for thepurpose above set forth.

.2. ATV-shaped Vgrate-bar, having a -series of'. circular apertures near to .each ond, substantially as herein-4 before described 3, A Tiiron grate-bar,.constructed with o r without apertures through it, substantially as above described, asa new 'articleoi' manufacture.

` In testimony'whereof, I, the said ANDREW Haarsma have hereunto set my hand.

"ANDREW HARTUPEE.

Witnesses:

A. '8. NronoLsoN, G. H. Onarsrr. 

